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Finding the Fourth Proportional to 3,981,489.75, 5,972,256.50 and 989,673.75

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Solution

The fourth proportional to 3,981,489.75, 5,972,256.50 and 989,673.75 is: 1,484,516.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,489.75 : 5,972,256.50 = 989,673.75 : x
  2. Step 2: Convert to fraction form
    3,981,489.75/5,972,256.50 = 989,673.75/x
  3. Step 3: Cross multiply
    3,981,489.75x = 5,972,256.50 × 989,673.75
  4. Step 4: Simplify right side
    3,981,489.75x = 5,910,585,481,368.51
  5. Step 5: Solve for x
    x = 5,910,585,481,368.51/3,981,489.75
  6. Step 6: Final answer
    x = 1,484,516.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.